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01
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What do lookahead and lookbehind assertions do?
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A.
Lookbehind added with ES2015; supported in all old browsers
B.
Lookahead matches pattern and includes in result; lookbehind excludes
C.
Zero-width assertion; checks position without consuming pattern; lookahead looks forward; lookbehind looks backward
D.
Lookahead and lookbehind only work with global flag
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